Baker's Percentage Calculator
Calculate ingredient weights using baker's percentages, where all ingredients are expressed as a percentage of the total flour weight. This is the standard formula system used by professional bakers worldwide to scale recipes up or down with precision. See also our Yeast Converter and Cups to Grams Converter.
How to Use Baker's Percentages
Baker's percentage (also called baker's math or flour-based formula) is a notation method that expresses each ingredient's weight as a percentage of the total flour weight. Flour is always 100%, and every other ingredient is calculated relative to it. This system makes it easy to scale recipes to any batch size and to compare formulas at a glance.
- Start with your desired flour weight (this is always 100%)
- Determine the percentage for each ingredient (hydration, salt, yeast, etc.)
- Multiply flour weight by each percentage divided by 100
- Sum all ingredient weights for total dough weight
Formula:
Ingredient Weight (g) = Flour Weight (g) × (Ingredient % / 100)
Example: 500g flour at 65% hydration → Water = 500 × 0.65 = 325g
Understanding Hydration Percentage
Hydration is the most important baker's percentage after flour. It determines the dough's texture, handling characteristics, and the final bread's crumb structure. Low hydration (50-60%) produces stiff doughs for bagels and pretzels. Medium hydration (60-70%) is standard for sandwich bread and rolls. High hydration (70-85%) creates open-crumb artisan breads like ciabatta and baguettes. Very high hydration (85-100%) is used for focaccia and some sourdough styles.
Higher hydration doughs are stickier and harder to handle but produce lighter, more open bread with larger holes in the crumb. Lower hydration doughs are easier to shape but produce denser, tighter crumb structures. Most home bakers find 65-70% hydration to be the sweet spot — manageable to work with while still producing excellent bread.
Common Bread Formulas in Baker's Percentages
| Bread Type | Hydration | Salt | Yeast | Sugar | Fat |
|---|---|---|---|---|---|
| French Baguette | 65-68% | 2% | 0.6% | 0% | 0% |
| Sandwich Bread | 60-65% | 2% | 1.5% | 5-8% | 5% |
| Ciabatta | 75-80% | 2% | 0.8% | 0% | 3% |
| Brioche | 55-60% | 2% | 2% | 10-15% | 15-20% |
| Pizza Dough | 60-65% | 2% | 0.5% | 2% | 3% |
| Bagels | 50-55% | 2% | 0.8% | 3% | 0% |
| Focaccia | 75-85% | 2% | 1% | 0% | 8-10% |
| Challah | 50-55% | 1.5% | 1.5% | 10% | 8% |
Example: Scaling a Baguette Recipe
A classic French baguette formula is: flour 100%, water 67%, salt 2%, yeast 0.6%. To make 3 baguettes (each about 350g), you need approximately 1050g of total dough. Working backwards: total percentage = 100 + 67 + 2 + 0.6 = 169.6%. Flour needed = 1050 / 1.696 = 619g. Water = 619 × 0.67 = 415g. Salt = 619 × 0.02 = 12.4g. Yeast = 619 × 0.006 = 3.7g. This scaling ability is why professional bakeries rely on baker's percentages.
The Role of Each Ingredient
- Flour (100%): Provides structure through gluten; the foundation of all calculations
- Water (50-100%): Hydrates gluten, activates yeast, determines crumb openness
- Salt (1.5-2.5%): Strengthens gluten, controls fermentation speed, adds flavor
- Yeast (0.5-2%): Leavening agent; less yeast = longer rise = more flavor development
- Sugar (0-15%): Feeds yeast, adds sweetness, promotes browning (Maillard reaction)
- Fat (0-20%): Tenderizes crumb, extends shelf life, adds richness
- Eggs: Add structure, richness, color, and moisture; count as part of hydration
- Milk Powder: Improves crust color, adds nutrition, softens crumb
Why Baker's Percentages Matter
Baker's percentages solve the fundamental problem of recipe scaling. If you have a recipe for 2 loaves and need to make 50, you cannot simply multiply everything by 25 without understanding the ratios. Baker's percentages let you instantly see the character of a bread formula — a 65% hydration bread with 2% salt and no sugar is clearly a lean French-style bread, while 55% hydration with 15% sugar and 20% fat is obviously an enriched bread like brioche. This notation is universal across languages and bakeries worldwide.
Frequently Asked Questions
What is baker's percentage?
Baker's percentage is a formula notation where flour is always 100% and all other ingredients are expressed as a percentage of the flour weight. For example, 65% hydration means the water weighs 65% of what the flour weighs. If you have 1000g flour, you use 650g water. This is different from true percentages where all ingredients would add up to 100%.
What hydration should I use for bread?
For beginners, start with 60-65% hydration — this produces a manageable dough that is not too sticky. For sandwich bread, 60-65% works well. For artisan bread with open crumb, try 70-75%. For ciabatta or focaccia, go to 75-85%. Higher hydration requires more skill in handling but produces lighter, more open bread.
How much salt should I use in bread?
The standard is 2% of flour weight (10g salt per 500g flour). This provides good flavor and gluten strength without being noticeably salty. Going below 1.5% produces bland bread with weak structure. Going above 2.5% can inhibit yeast activity and make bread taste too salty. Some health-conscious bakers use 1.8% as a compromise.
How do I convert a regular recipe to baker's percentages?
Divide each ingredient's weight by the total flour weight, then multiply by 100. For example, if a recipe uses 500g flour and 325g water: water percentage = (325 ÷ 500) × 100 = 65%. Do this for every ingredient. Flour will always be 100%. If a recipe uses multiple flours, add them together for the total flour weight.
What does "total dough weight" mean?
Total dough weight is the sum of all ingredient weights before baking. It helps you determine how many loaves or rolls you can make from a batch. A standard sandwich loaf uses about 900g of dough, a baguette uses about 350g, and a dinner roll uses about 60-80g. Bread loses 10-15% of its weight during baking due to moisture evaporation.
Can I use baker's percentages for cakes and pastries?
Baker's percentages are primarily designed for bread formulas where flour is the dominant ingredient. They can be adapted for cakes, but the system works less intuitively when sugar or butter exceeds the flour weight (as in many cake recipes). For cakes, many bakers prefer ratio-based systems or traditional weight-based recipes instead.